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This is a reland of https://crrev.com/c/2548880 which was reverted
due to a flaky test. The flakiness root cause was resolved in
https://crrev.com/c/2552921. Therefore, there're no changes in this
CL from the original.

TBR=jamescook@chromium.org, poromov@chromium.org, isandrk@chromium.org, bmalcolm@chromium.org

Original CL description:
Capture Mode should be disabled when the `kDisableScreenshots` policy
is disabled.
It also should be disabled when a tab requests to be in a locked
fullscreen mode, and any on going recording should be interrupted.

BUG=1150585
TEST=Existing, and added a new test.

Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2548880Reviewed-by: James Cook <jamescook@chromium.org>
Reviewed-by: Sergey Poromov <poromov@chromium.org>
Reviewed-by: Ivan Šandrk <isandrk@chromium.org>
Reviewed-by: Brian Malcolm <bmalcolm@chromium.org>
Commit-Queue: Ahmed Fakhry <afakhry@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#829390}
Change-Id: If427589bcaf9837d0def703dbeff6fc03b8167cc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2552215Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#829927}